Having clear, measurable goals will help you determine whether to make changes based on your results. For example: after a survey, the results indicate that a large percentage (35%) of students does not feel that the instructor made course objectives completely clear. If one of the instructor's goals is to have all students understand course objectives, this result is disappointing. Based on this finding, the instructor might decide to list objectives in the syllabus and state them several times during the semester.
Generally, if at least one-third of respondents express dissatisfaction with an aspect of instruction, consider making changes. If at least one-third expresses neutrality, it suggests that an instructor is doing an adequate, but not outstanding, job in that area.